There's a product called Corrosion X.
This stuff works - period.
One of my shooting buddies is an avid Garand freak. After a few years of fondling and shooting his I took the plunge and bought one.
I purchased a can of Korean ammo on enblocs (to get the enblocs) and took it out for an afternoon at the range. Low 90's and humid as a steam bath.
I went thru about 250 rounds of the stuff. All went bang, accuracy varied, but overall it wasn't bad.
When I bought the ammo, it was available in a 400 round can (in boxes) or the 384 round can on enblocs. The boxed ammo was advertised as boxer, non-corrosive. It was right next to the ammo on enblocs.
About a week after I got back from shooting I decided to process the brass and get a can of IMR4895 and find the sweet spot on my new (to me) Garand. I broke a decapping pin on the first round. I thought wow, the Koreans really crimp their brass. No biggie, I had a spare pin. Next round, primer wouldn't budge. I get a light and check out the inside of the case - it's berdan primed.
I called the place I bought the ammo from and told them somehow some berdan primed stuff had gotten mixed up with the boxer. NP, bring it back and swap it out - great
I got to the store with what's left of the ammo in the can and THEN noticed, the ammo on the enblocs was noted (in damned small print I might add) as 'mildly corrosive'.
My heart jumped up in my throat
MY NEW GARAND IS SITTING HOME RUSTING AWAY
I hit the bricks and got home fast. Ran in the house, fumbled the safe combo three times and finally got it open.
I took the Garand to the bench and grimaced as I pulled the bolt back. Everything looked ok. I put a bore light on it, the bore was fine. I called my shooting buddy and told him the ammo we were shooting was corrosive and he should check his Garand and do it quick.
He tells me he has shot lots of the Korean on enblocs and all of it was corrosive... he already knew that. Then he released the magic words that were music to my ears..
That's why I squirted a dose of Corrosion X down the barrels and all in the actions before we left the range, whaddya think I'm an idiot ?
I remembered him doing that and telling me, this will help make cleaning easier.
I usually do the same with CLP, I just figured he had fallen prey to some new fangled snake oil salesman and let it go.
Corrosion X is some seriously good stuff. It cuts crud like nothing else and is pretty cheap. I bought the squirt bottle and have been using it for almost a year and still haven't used it all up.
It might be worth keeping a bottle in your range bag.
BigSlick